warner quiz 11
A balloon tied to the ground with a rope floats in the air. The volume of the balloon is 1 L and the pressure in the balloon is 0.8 atm. If the balloon is placed deep underwater where it compresses so the pressure in the balloon is 4 atm, what will be the new volume of the balloon? ___ L
.2
If the gas in the above system has a volume of V at a pressure of P, what is the volume of the same gas at a pressure of 4P? ___ V
.25V
A sample of O2 occupies 75 L at 1 atm. If the volume of the sample doubles, what is the new pressure of O2? ___ atm
.5
A sample of krypton gas in a container of volume 1.90 L exerts a pressure of 0.553 atm at 21°C. How many moles of gas are present? _________ mol Kr
0.0436
2.00 moles of an ideal gas was found to occupy a volume of 17.4 L at a pressure of 3.00 atm and at a temperature of 45 °C. Calculate the value of the gas constant 'R' in ? ___
0.0821
If we have 10,00010,000 gaseous molecules at 100∘C100∘C which exert a pressure of 0.10 atm0.10 atm in a container , then adding another 10,00010,000 gaseous molecules of any substance at the same temperature to the container would increase the pressure to _____ atm.
0.2 atm
A sample of gas occupies a volume of 40 L, has a temperature of 280 K and a pressure of 15 kPa. Calculate the number of moles of gas which are present in the sample.
0.26 mol
A sample of helium gas occupies 12.9 L at 315 K and 1.20 atm. This sample contains how many moles of helium? ______ mol He
0.599
Calculate the pressure exerted by 66.0 g of CO2 gas at -14.5 °C that occupies a volume of 50.0 L. ______ atm
0.637
A chamber with a fixed volume is shown above. The temperature of the gas inside the chamber before heating is 25.2 °C and its pressure is 0.600 atm. The gas is heated with a flame to a temperature of 72.4 °C, what is its pressure at this temperature? ___ atm
0.695
A sample of oxygen gas occupies 23.4 L at 298 K and 86.5 kPa. This sample contains how many moles of oxygen?
0.817 moles
Daryl adds 100 mL of boiling water to 200 mL of ice water. If she then puts the 300 mL of water into a freezer, at what temperature will the water freeze?
0°C
At 27∘C27∘C and one atmospheric pressure, a sample of gas has volume VV. What will be the volume of the sample at 492∘C492∘C and a pressure of 1.5 atm1.5 atm?
1.7 V
A 5.00 L sample of helium expands to 12.0 L at which point the pressure is measured to be 0.720 atm. What was the original pressure of the gas? _____atm
1.73
355 g of chlorine gas (MW = 70.9 g/mol) is held in a vessel with a fixed volume of 70.0 L. What is the pressure of the gas in atmospheres if its temperature is 30.0 °C? _____ atm
1.78
A sample of oxygen gas occupies 42.0 L at STP. This sample contains how many moles of oxygen gas?
1.88 moles
The image above shows a rigid container filled with gas at a temperature of 300 K and a pressure of 10.0 atm. If the temperature increases to 320 K, what is the new pressure of the container? ___ atm
10.7
A sample of gas Y occupies 500 L at the pressure of 80 KPa. After changing the volume of the sample, the pressure of it is 400 KPa. What is the new volume of the gas? ___ L
100
The above shows a sealed flask filled with oxygen gas. The gas has a temperature of 300.0 K and a pressure of 101 kPa. If the temperature increases to 320.0 K, what is the new pressure of the oxygen gas? ___ kPa
108
The image above shows a chamber with a fixed volume filled with gas at a pressure of 1560 mmHg and a temperature of 445.0 K. If the temperature drops to 312.0 K, what is the new pressure of the gas in the chamber? ___ mmHg
1090
Assuming nitrogen behaves like an ideal gas, what volume would 14.0 g of nitrogen gas (N2) occupy at STP? The gas constant is 0.0821 . ___ L
11.2
A gas sample in a rigid container at 455 K is cooled to 273 K where it has a pressure of 1 atm. What was the original pressure of the gas in mmHg? _____ mmHg
1270
The above shows a balloon full of gas which has a volume of 120.0 mL at 300.0 K. Assuming pressure remains constant, what is the volume of the balloon if the temperature of the gas increases to 320.0 K? ___ mL
128
A birthday balloon had a volume of 14.1 L when the gas inside was at a temperature of 13.9 °C. Assuming no gas escapes, what is its volume when the balloon warms up to 22.0 °C? ___ L
14.5
A container holds four times as many moles of CO2 as O2. If the total pressure in the container is 20. atm, what is the pressure exerted by carbon dioxide? ___ atm Round your answer to the nearest whole number.
16
The pressure and temperature inside a bike tire is 10 atm and 10 K respectively. What will the pressure become in the tire when the temperature is increased 20 k?
20 atm
A15.0 L15.0 L tank of gas is contained at a high pressure of 8.20×1048.20×104 torr. The tank is opened and the gas expands into an empty chamber with a volume of 6.00×104 L6.00×104 L. Calculate the new pressure of the gas. _____ torr
20.5
What is the typical pressure of the air in a scuba tank?
200-300 atm
If the uncompressed gas in the above system has a volume of 300.0 mL at a pressure of 20.0 kPa, what is the volume of the gas when it is compressed to a pressure of 25.0 kPa? ___ mL
240
A sample of nitrogen gas is at a temperature of 50.0 °C and a pressure of 2.00 atm. If the volume of the sample remains constant and the pressure increases to 3.20 atm, what is the new temperature of the nitrogen gas? ______°C
244
The gas pressure in an oxygen tank is 3.90 atm at a temperature of 298 K. If the pressure decreases to 3.20 atm, what is the temperature of the gas in kelvin? ___ K
245
If the gas in the piston above has a volume of 20.0 L at a temperature of 25 °C, what is the volume of that gas when it is heated to 100 °C if the pressure remains constant? ___ L
25
What would be the approximate volume of the air in a typical scuba tank if the pressure were 1 atm?
2500 L
A container with a fixed volume, filled with hydrogen gas at −104°C and 71.8 kPa is heated until the pressure reaches 225.9 kPa. What is the temperature of the hydrogen gas in degrees Celsius? _____ °C
258
A flask holds five times as many moles of N2 as O2. If the total pressure in the jar is 18 atm, what is the pressure exerted by oxygen? ___ atm
3
Two gases AA and BB with a mole ratio of 3:53:5 respectively, are combined in a container and exert a pressure of 8 atm8 atm. If BB is removed, what would be the pressure due to AA only, with the temperature remaining constant?
3 atm
The volume of a gas at STP is 1.12×10−7cc1.12×10−7cc. Calculate the number of molecules of gas.
3.01×1012
Calculate the volume occupied by 32.0 g of O2 gas, the pressure of the O2 gas is 78.5 kPa at 25 °C. ___ L
31.5
At what Celsius temperature does 0.750 mol of an ideal gas occupy a volume of 35.9 L at 114 kPa? ______°C
383
A sample of hydrogen gas occupies 50.4 L at STP. This sample contains how many moles of hydrogen atoms?
4.5 mols
21.7 mL of gas at 98.8 kPa is allowed to expand at constant temperature into a 52.7 mL container. What is the new pressure of the gas? _____ kPa.
40.7
A sample of gas X occupies 10 m3 at a pressure of 120 kPa. If the volume of the sample is compressed to 3 m3, what is the new pressure of the gas? ___ kPa
400
What would be the volume occupied by two moles of propane gas at standard conditions?
44.8 liters
A sample of Krypton gas occupies 66.7 L at 25.0 °C. Assuming constant pressure, what would the temperature of the gas be in kelvin if the volume increases to 100.0 L? ___ K
447
A car tire was inflated to 82.0 kPa in a repair shop where the temperature is 26.0 °C. What is the temperature of the gas in the tire if the pressure in the tire increases to 87.3 kPa when it is taken out of the repair shop? ___ °C
45.3
If two gases, A and B, in separate 1 liter containers exert pressures of 2 atm and 3 atm respectively, what will be the pressure exerted when both gases are put together in a single 1 liter container?
5 atm
How many moles of carbon dioxide gas occupy a volume of 81.3 L at 204 kPa and a temperature of 95.0 °C? ______mol CO2
5.42
The pressure of a mixture of nitrogen, carbon dioxide, and oxygen is 300 kPa. What is the partial pressure of oxygen if the partial pressures of the nitrogen and carbon dioxide are 200 kPA and 48 kPa, respectively?
52 kPa
The image above shows a balloon filled with gas which has a volume of 100 mL at 300K. Assuming constant pressure, what is the absolute temperature of the gas if the volume of the balloon increases to 200 mL? ___ K
600
You have a balloon filled with hydrogen gas which keeps it at a constant pressure, regardless of its volume. The initial volume of the gas is 736 mL at 15.0 °C. The gas is heated until its volume is 2.28 L, what is its final temperature in degrees celsius? _____ °C
619
One mole of an ideal gas was found to occupy a volume of 20.0 L at a pressure of 930. mmHg and at a temperature of 25 °C. What is the value of the gas constant in ? ___
62.4
The image above shows a gas held in a chamber with a fixed volume. The gas begins with a temperature of 333 K and a pressure of 4.00 atm (green) that increases to 7.65 atm (orange) as the gas is heated. What is the temperature of the gas when the pressure increases to 7.65 atm? ___ K
637
Given that a vessel contains 0.672 mol O2, 0.128 mol CO2, and 0.200 mol N2.If the total pressure of the vessel is 100 atm, what are the partial pressures of O2, CO2, and N2 respectively?
67.2 atm, 12.8 atm, 20.0 atm
A balloon filled with 1.22 L of gas at 286 K is heated until the volume is 2.86 L while the pressure remains constant. What is the temperature of the gas in Kelvin? _____ K
670
Argon makes up 0.93 % of the atmosphere. In a given sample of air, the partial pressure of argon is 6.54 mmHg. What is the pressure of the sample?
703 mmHg
217 mL of neon gas at 551 °C is brought to standard temperature (0 °C) while the pressure is held constant. What is the new volume? _____ mL
71.9
Assuming oxygen behaves like an ideal gas, what volume in liters would 3.50 moles of oxygen gas occupy at STP? ___ L
78.4
4.00 moles of an ideal gas was found to occupy a volume of 100. L at a pressure of 99.1 kPa and at a temperature of 25.0 °C. What is the value of the gas constant in L⋅kPamol⋅KL⋅kPamol⋅K ? ___ L⋅kPamol⋅K
8.31
At 20 °C, 2.00 moles of H2 gas was found to occupy a volume of 24.0 L at a pressure of 203 kPa. What is the value of the gas constant?
8.31
At 25 °C, 1.00 mole of O2 gas was found to occupy a volume of 12.5 L at a pressure of 198 kPa. What is the value of the gas constant in ? ___
8.31
At STP (101.3 kPa, 0 °C), one mole of Ar gas was collected and was found to occupy a volume of 22.4 L. What is the value of the gas constant in rounded to the nearest hundredth? ___
8.31
On Venus, the atmospheric pressure is 2700 mmHg and nitrogen gas makes up 3.0 % of the atmosphere. What is the partial pressure of nitrogen on Venus? ______ mmHg
81
A sample of gas has a volume of 100.0 L at 135°C. Assuming the pressure remains constant, what is the volume of the gas if its temperature decreases to 72.0 °C? ___ L
84.6
Hexane is a nonpolar liquid. The vapor pressure of hexane at its normal boiling point is _____.
= 1 atm
At which of the following point do the three phases of a substance coexist?
A
Which of the labeled points represent the triple point of the phase diagram below?
A
What is the relationship of vapor pressure to temperature of a liquid?
As temperature increases, vapor pressure increases.
Consider the phase diagram below. Which substance is in the liquid phase?
B
Which of the following transition is considered the phase change from water to steam?
B→C
Which curve represent the phase boundary of equilibrium between solid and liquid?
Curve CA
A liquid is converted into a gas upon sublimation.
FALSE
According to Dalton's law of partial pressure, pressure of dry gas is equal to the sum of pressures of moist gas and aqueous tension.
FALSE
All molecules have the same kinetic energy and hence the same speed.
FALSE
At high temperature and low pressure, liquid water is the stable phase.
FALSE
Gay-Lussac's law states that for a gas at constant pressure, volume is directly proportional to temperature.
FALSE
If the mass and volume of a gas in a closed container are held constant, the gas temperature decreases and so does its pressure.
FALSE
In Gay-Lussac's law, temperature is measured in Celsius.
FALSE
In a given mixture of gases which do not react with one another, the ratio of partial pressure to total pressure of each component is equal to its weight percent.
FALSE
In the phase diagram of water, at high pressure, the solid and liquid boundary shows a positive slope.
FALSE
Solids will expand easily upon heating. This expansion is caused by the decreased energy of particle vibration.
FALSE
The critical temperature is the lowest temperature at which the substance can possibly exist as a liquid.
FALSE
The freezing point of pure water is 3∘C.
FALSE
The spaces between the molecules in liquids are large, so liquids have very high compressibility.
FALSE
The total pressure of gas molecules is equal to the product of the partial pressure of individual components.
FALSE
True or False: H2O2 decomposes into hydrogen and oxygen as described in the following reaction: H2O2 (l) → H2 (g) + O2 (g) If a sample of the products is collected and the total pressure is 12.4 atm, the partial pressure of oxygen gas is 12.4 atm.
FALSE
Vapor pressure is independent of the temperature of the liquid, so raising the temperature does not affect the rate of evaporation.
FALSE
Which change of state represents sublimation?
H2O(s)→H2O(g)
When there is an increase in temperature of a gas in an enclosed container, the pressure will also increase due to the:
Increase in kinetic energy of molecules
What scale is used to measure absolute temperature?
Kelvin
According to the kinetic molecular theory of gas:
Molecules are in a state of ceaseless and random motion in all directions
0.44 g of a colorless oxide of nitrogen occupies 224 mL at STP. The compound is:
N2O
Which of the following is compressible?
Na(g)
The mathematical form of Gay-Lussac's Law is:
P/T=k
Which of these is a constant in the ideal gas equation?
R
Which of the following scientists was the first to determine the relationship between the pressure and volume of a gas?
Robert Boyle
Which type of curve is shown by DC in the given phase diagram?
Sublimation curve
400 mL of nitrogen gas at 700 mmHg and 300 mL of hydrogen gas at 800 mmHg were introduced into a vessel of 2 L at the same temperature. The final pressure of the gas mixture will be 260 mmHg.
TRUE
A liquid is placed in a closed container and time passes until the level of the liquid is constant.At this point, the rate of evaporation is equal to the rate of condensation.
TRUE
A phase diagram is a chart which shows the complete description of the distinct phases in equilibrium of a specific substance.
TRUE
A solid cannot be compressed because the particles in it are closely packed.
TRUE
Above a temperature of absolute zero, atoms and molecules are constantly in random motion.
TRUE
According to Gay-Lussac's law, at constant volume, the pressure of a fixed amount of gas varies directly with temperature.
TRUE
Equal volumes of all gases under similar conditions of temperature and pressure contain an equal number of molecules, i.e., V is directly proportional to N.
TRUE
For a fixed number of moles of gas at constant volume, the pressure will increase with a rise in temperature due to an increase in the average molecular speed.
TRUE
Gay Lussac's law provides the mathematical relationship between pressure and temperature.
TRUE
Gay-Lussac's Law applies when the container of gas is rigid, while Charles's Law applies when the container is flexible.
TRUE
In a mixture of gases, each gas exerts pressure independently of the others.
TRUE
In a phase diagram of water, the melting point of ice decreases as the pressure increases.
TRUE
In the below mentioned phase diagram of water, the curve OC shows the effect of pressure on the melting point of ice.
TRUE
In the phase diagram shown here: , the line OC is almost vertical because the melting point of a solid is not very sensitive to changes.
TRUE
Increasing the pressure in the cylinder by adding a gas not involved in the reaction will increase the total gas pressure in the cylinder.
TRUE
Solids are the only state of matter that is not a fluid.
TRUE
The compressibility of gases is very high.
TRUE
The constant random motion of gas molecules causes them to collide with each other and with the walls of their container.
TRUE
The freezing point of a substance is the temperature at which the solid and liquid forms are in equilibrium.
TRUE
The melting of ice occurs at the same temperature as the freezing of water.
TRUE
The phase of a substance may change due to the changes in temperature.
TRUE
The relationship between temperature and pressure was investigated by French chemist, Joseph Gay-Lussac.
TRUE
The vibrational forces overcome the attractive forces holding the particles of the solid together while a material melts.
TRUE
The average kinetic energy of gas particles depend(s) on the:
Temperature of the system
With the help of his dad, a boy inflated a bunch of balloons outside on a hot, sunny day. The outdoor temperature was 26°C. Then the boy took the balloons inside his air-conditioned house, where the temperature was 20°C. What do you think happened to the balloons after they had been inside the cool house for a while?
The balloons shrink.
What is the relationship between the altitude and the vapor pressure of liquids?
The higher the altitude the higher the vapor pressure.
Why are the particles of liquids and solids so much closer together than those of gases?
The lower kinetic energy of the particles allows attractive forces to keep them together.
Which statement(s) are TRUE for a liquid that is at its boiling point?
The molecules all throughout the liquid have enough kinetic energy to enter the gas phase. The vapor pressure of the liquid and the atmospheric pressure are equal.
What is different about the general structure of the phase diagram for water compared to most other substances?
The slope of the line between solid and liquid is negative.
Which of the following factors affect the average kinetic energy of gases?
The temperature of the gas
What best describes the kinetic energy of two gas particles before and after a collision?
The total kinetic energy of the two particles stays the same.
Which of the following correctly describes the characteristics of a triple point?
Where three phases of a substance coexist
The ideal A gas at X °C The ideal B gas at Y °C The ideal C gas at Z °C If the kinetic energies of the three gases is expressed as: KEA > KEB > KEC, which of the following is the correct relationship of temperatures X, Y, and Z?
X>Y>Z
If the temperature of a liquid is raised above its boiling point, then the substance in its gaseous phase is called _____.
a vapor
According to the ideal gas equation, the pressure of a gas is:
all of the above
The rate of condensation of a gas depends on:
all of the above
Which is a property of most solids?
all of the above
Which of the following factors influences rate of evaporation?
all of the above
Which of the following statements regarding gas temperature and kinetic energy is/are correct?
all of the above
When water vapor _____, it gives the same amount of potential energy which it gained.
changes into water
The process of converting gas molecules into liquid molecules is known as____.
condensation
The _____________ point is the highest temperature at which the substance can possibly exist as a liquid.
critical
The critical pressure is the pressure that must be applied to the gas at the _____ in order to turn it into a liquid.
critical temperature
The highest temperature at which a substance can exist in the liquid phase is called its _____.
critical temperature
Steam distillation is based on:
dalton's law
The process of a gas being converted directly to a solid is called _____.
deposition
What is the change of state from gas to solid called?
deposition
A liquid is placed in a closed container and time passes until the level of the liquid is constant.The general situation described by the rate of evaporation is equal to the rate of condensation called a:
dynamic equilibrium
Collisions between gas particles and between particles and the container walls are _________ collisions because there is no overall loss of kinetic energy.
elastic
The triple point is the one condition of temperature and pressure where the solid, liquid and vapor states of a substance can all coexist at _____.
equilibrium
As the temperature increases, the rate of _____ increases.
evaporation
_____ is a process in which the liquid state is converted into gas state.
evaporation
_________ is the conversion of a liquid to its vapor below the boiling temperature of the liquid.
evaporation
If the temperature of a substance increases, will the particles of that substance be moving faster or slower or at the same speed as they were before the temperature changed?
faster
The melting point and _____ point of mercury is 234.32 Kelvin.
freezing
The phase diagram of substance M is shown above. Initially, M is at point B. After a significant decrease in temperature, M is at point A. What phase change has M gone through?
freezing
Consider the phase diagram below. Substance C is in the:
gas phase
If a substance is in the vapor form, it is said to be in the _____ phase.
gaseous
If the attractive forces in a substance is much less than the molecular motion, then the substance will be in _____ state.
gaseous
Weak intermolecular forces produce a ____ rate of evaporation and vapor pressure.
higher
As the temperature increases, the vapor pressure _____.
increases
As the temperature rises, the number of molecules escaping from a liquid surface _____.
increases
A puddle of liquid is evaporating. What happens to the temperature of the liquid that remains in the puddle?
it decreases.
The unit of a kPa•L is equal to a _____, the SI unit of _____.
joule; energy
What temperature scale must be used when applying Charles' law?
kelvin
When a liquid is heated, the average ____________ energy of its particles will increase.
kinetic
When a substance is heated the:
kinetic energy increases
What happens when a liquid is heated?
kinetic energy increases. vapor pressure increases
What does a solid become when it is subjected to high pressure near the freezing point?
liquid
To evaluate R, the volume of a gas measured in _____, while the temperature of the gas is measured in _____.
liters; kelvin
How do the vapor pressure of solids generally compared to that of liquids?
much lower
In the ideal gas equation, 'n' represents the:
number of moles of the gas
Complete the sentence using total, partial or complete. The pressure that one particular gas exerts when it is part of a mixture of gases is called the ______ pressure of that gas.
partial
Assuming the temperature of a gas in a closed system is constant. If the volume is increased, how can the system adjust to the change?
pressure decreases
If the temperature of a gas in a closed system remains unchanged and the gas system is compressed, how will pressure of the system change?
pressure increases
When the absolute temperature of gas molecules is increased 4 times, the average kinetic energy:
quadruples
Which of the following are practical uses of compressed gases?
scuba tanks anesthesia for major surgeries propane tanks for barbecues
Which phase is represented by the area above the curve ACD?
solid
A phase diagram is a graph which the conditions of temperature and pressure under which a substance exists in the _____.
solid liquid gas
Consider the phase diagram below. Substance A is in the:
solid phase
What best describes the path of the gas particles in a given sample of gas?
straight path which changes upon collisions with other particles
____ intermolecular forces produce a lower rate of evaporation and a lower vapor pressure.
strong
Particles of this state matter are closely packed and are not easily compressed. After a change, the particles are able flow and are easily compressible. The phase change is:
sublimation
The phase change involved in the following particle diagram is:
sublimation
The phase diagram of substance M is shown above. Initially, M is at point A. After a significant decrease in pressure, M is at point C. What phase change has M gone through?
sublimation
What is the change of state from solid to gas called?
sublimation
At room temperature and pressure, the distance between gas particles is about _____ times the diameter of the particles themselves.
ten
What is the critical pressure?
the pressure required to liquefy a substance at the critical temperature
In the ideal gas equation, R represents _____.
the universal gas constant
Gases are compressible because of:
the very large space between gas particles
The average kinetic energy of the particles in a sample of matter at 600 K is _____ as the average kinetic energy of the particles in another sample at −73°C.
three times greater
Which of the following correctly describes the A point of the phase diagram?
triple point
The __________ pressure is the pressure produced when molecules are released from the liquid state and enter the gaseous state above the surface of the liquid.
vapor
_____ is the pressure exerted by a vapor in thermodynamic equilibrium with its condensed phase at a given temperature in a closed system.
vapor pressure
____________ ___________ is a measure of the force exerted by a gas above a liquid in a sealed container.
vapor pressure
Which statement(s) is/are TRUE for a liquid that is evaporating?
vapor pressure < atmospheric pressure Bubbles cannot form.
Evaporation is a type of _____ and is a surface phenomenon.
vaporization
What type(s) of motion do the particles in a solid undergo?
vibrational only
Which of the following remains constant in Gay-Lussac's law?
volume
When high pressure is applied to a gas, its _____.
volume decreases
Assuming the pressure of a gas in a closed system is constant. If the temperature is increased, how can the system adjust to the change?
volume increases
The freezing point of pure water is _____ degree(s) Celsius.
zero
The actual volume of molecules of gas is negligible as compared to the total volume of gas since:
A large volume is occupied by empty spaces
An increase in the temperature of a liquid decreases the rate of evaporation.
FALSE
As the temperature increases, the rate of evaporation decreases.
FALSE
Condensation occurs when a vapor is heated.
FALSE
Consider two 100 mL samples of water, one at 40°C and one at 80°C.None of the water molecules in the 40°C sample have a higher kinetic energy than any of the molecules in the 80°C sample.
FALSE
Consider two 100 mL samples of water, one at 40°C and one at 80°C.The average kinetic energy of the molecules in the 80°C sample is twice as great as the average kinetic energy of the molecules in the 40°C sample.
FALSE
Generally, the values for the melting point of a solid and the freezing point of its liquid form are different.
FALSE
The rate of evaporation decreases with the increase in the temperature of the liquid.
FALSE
The strength of the metallic bond does not depend on the packing arrangement of the metal atoms.
FALSE
Vaporization and condensation are two different names given to the same process.
FALSE
When a liquid substance evaporates, it turns into a solid.
FALSE
A liquid is placed in a closed container and time passes until the level of the liquid is constant. Which equation describes the situation?
H2O(l)⇆H2O(g)
A solid substance melts when it is heated up to such a level that the intermolecular forces balance the molecular motion.
TRUE
Absolute zero is the temperature where all particle motion ceases.
TRUE
Average kinetic energy is directly related to temperature on the Kelvin scale.
TRUE
For an ideal gas, the forces of attraction between the molecules of the gas are negligible.
TRUE
Gases are in constant rapid motion with random collisions.
TRUE
What is the relationship between the altitude and the boiling point of liquids?
The higher the altitude the lower the boiling point.
What is the relationship between temperature and vapor pressure?
The higher the temperature the higher the vapor pressure.
What is the relationship between vapor pressure and boiling point?
The higher the vapor pressure the lower the boiling point.
What is the relationship between the temperature of a gas sample and the kinetic energy of the particles of the gas?
They are directly related.
In which of the following states of matter would molecules be moving the most?
gaseous
A gas that completely obeys all of the assumptions of the kinetic-molecular theory is called a(n) _____.
ideal gas
Vapor pressure _____ with the rise in temperature.
increases
When heating a substance, its average kinetic energy _____.
increases
Would you expect ethane (C2H6)(C2H6) to have a higher or lower melting point than water?
lower
A substance undergoes a phase change. Before the change, the substance does not flow and after the change, the substance expands to fill its container. The phase change is:
sublimation
Carbon dioxide and iodine is an example of a materials that easily undergoes _____.
sublimation
Ferrocene is purified by ____________ using gentle heating at atmospheric pressure.
sublimation
_____ is the change of state from a solid to a gas without passing through the liquid state.
sublimation
The average speed and kinetic energy of the particles in a gas are proportional to the measured _______________ of that gas.
temperature
The _____________ forces overcome the ______________ forces holding the particles of the solid together while a material melts.
vibrational, attractive